Hi,

Currently mongocxx build directory exposes LIBMONGOCXX_INCLUDE_DIRS and LIBMONGOCXX_LIBRARIES in its config.cmake which projects depending on libmongocxx can use.

It would instead be preferable to additionally export targets so that other projects can use libmongocxx (and by extension libbson and libmongoc) as subprojects in their own projects. It is additionally, the recommended way for projects to link to third party projects and avoids having to specify both INCLUDE and LINK dir separately.